No. TurboTax cannot get your 2018 return if you did not use TurboTax software. You can get a free transcript from the IRS or you can pay the IRS $43 for a copy of your return.
Or you can pay the IRS $43 for an actual copy of your tax return which will include copies of your W-2’s
Or---did I misunderstand----do you mean that you prepared a 2018 return using TurboTax but you did not file it? If you want to file it now, you have to pay your TurboTax fees and then print, sign and mail it in. It cannot be e-filed.
Or----do you mean you used TT for 2018 and you want a copy (Your question was pretty unclear).
You have to access your own account and/or print it for yourself using exactly the same account and user ID that you used when you prepared the return.
Many people have multiple TT accounts and forget how to access them. Log out of the account you are in now.
Or did you use the desktop version of TurboTax? If so, the files are on your own hard drive or any backup device you used like a flash drive.